Zúñiga, J., Gomez, C., Aguilar, S., Toutain, L., Céspedes, S., and D. Wistuba, "Static Context Header Compression (SCHC) Compound Acknowledgement (ACK)", RFC 9441, DOI 10.17487/RFC9441, July 2023, <https://www.rfc-editor.org/info/rfc9441>.